D$\begin{array}{*{20}{c}}
{\begin{array}{*{20}{c}}
\,\,\,\,\,\,{C{H_3}}\\
|
\end{array}}\\
{C{H_3} - C - OH}\\
|\\\,\,\,\,\,\,\,
{C{H_3}}
\end{array}$
d
$\begin{matrix}
C{{H}_{3}}-CH-C{{H}_{3}} \\
\,|\,\,\,\,\,\, \\
\,N{{H}_{2}} \\
\end{matrix}$ $\xrightarrow{HN{{O}_{2}}}$ $\underset{(A)}{\mathop{\begin{matrix}
C{{H}_{3}}-CH-C{{H}_{3}} \\
\,|\,\,\,\,\,\, \\
\,OH\, \\
\end{matrix}}}\,$ $\xrightarrow{Oxidation}$ $\underset{(B)}{\mathop{\begin{matrix}
O \\
|| \\
C{{H}_{3}}-C-C{{H}_{3}} \\
\end{matrix}}}\,$ $\xrightarrow{\begin{smallmatrix}
(1)\,C{{H}_{3}}MgBr \\
(2)\,{{H}_{2}}O
\end{smallmatrix}}$ $\underset{(C)}{\mathop{\begin{matrix}
\begin{matrix}
\,\,\,\,OH \\
|\, \\
\end{matrix} \\
C{{H}_{3}}-C-C{{H}_{3}} \\
| \\
\,\,\,\,\,\,\,C{{H}_{3}} \\
\end{matrix}}}\,$